Enable HPy test test_directly_setting_hpy_tpflags_internal_pure_raises

Author: fangerer

graalpython/lib-graalpython/modules/hpy/test/test_hpytype.py

@@ -791,7 +791,6 @@ class Sub(mod.Dummy):
             pass
         assert isinstance(Sub(), mod.Dummy)
 
-    @pytest.mark.xfail
     def test_directly_setting_hpy_tpflags_internal_pure_raises(self):
         import pytest
         mod_src = """